Simultaneous Nadir Overpasses (SNOs) Predictions
Prediction of SNOs between NOAA-21 and LANDSAT-9 Satellite Orbit:
Table of predicted SNOs for the next 14.0 days since TLE Epoch: 10/30/2025
| Index | Date (NOAA-21) | Time (NOAA-21) | Lat,Lon (NOAA-21) | SZA (NOAA-21 ) | Date (LANDSAT-9) | Time (LANDSAT-9) | Lat,Lon (LANDSAT-9) | SZA (LANDSAT-9 ) | Distance(km) | Time Diff (sec) |
| 1 | 10/31/2025 | 23:01:42 | 70.11,-169.13 | 84.43 | 10/31/2025 | 23:02:47 | 70.14,-169.11 | 84.45 | 2.51 | 65 |
| 2 | 10/31/2025 | 23:52:23 | -70.00, -1.64 | 95.67 | 10/31/2025 | 23:52:17 | -70.03, -1.63 | 95.65 | 3.06 | 6 |
| 3 | 11/01/2025 | 00:43:01 | 69.54, 166.35 | 83.89 | 11/01/2025 | 00:41:50 | 69.59, 165.41 | 83.93 | 36.92 | 71 |
| 4 | 11/03/2025 | 15:18:32 | 70.11, -53.32 | 85.27 | 11/03/2025 | 15:19:19 | 70.10, -53.29 | 85.27 | 1.33 | 47 |
| 5 | 11/03/2025 | 16:09:13 | -69.99, 114.18 | 94.84 | 11/03/2025 | 16:08:49 | -70.00, 114.20 | 94.83 | 1.42 | 24 |
| 6 | 11/06/2025 | 07:35:21 | 70.06, 62.55 | 86.03 | 11/06/2025 | 07:35:51 | 70.04, 62.50 | 86.01 | 2.74 | 30 |
| 7 | 11/06/2025 | 08:26:02 | -69.93,-129.94 | 94.09 | 11/06/2025 | 08:25:21 | -69.94,-130.01 | 94.08 | 3.06 | 41 |
| 8 | 11/08/2025 | 23:01:36 | -70.71, 10.01 | 92.55 | 11/08/2025 | 23:02:45 | -70.61, 11.55 | 92.65 | 57.92 | 69 |
| 9 | 11/08/2025 | 23:52:10 | 70.06, 178.33 | 86.82 | 11/08/2025 | 23:52:20 | 70.06, 178.40 | 86.81 | 2.48 | 10 |
| 10 | 11/09/2025 | 00:42:51 | -69.93, -14.15 | 93.30 | 11/09/2025 | 00:41:50 | -69.96, -14.11 | 93.28 | 2.99 | 61 |
| 11 | 11/11/2025 | 15:18:15 | -70.14, 126.70 | 92.37 | 11/11/2025 | 15:19:23 | -70.16, 126.77 | 92.35 | 3.27 | 68 |
| 12 | 11/11/2025 | 16:08:59 | 70.03, -65.82 | 87.54 | 11/11/2025 | 16:08:50 | 70.04, -65.75 | 87.55 | 3.02 | 9 |
| 13 | 11/11/2025 | 16:59:36 | -69.68, 102.02 | 92.81 | 11/11/2025 | 16:58:24 | -69.73, 101.44 | 92.77 | 22.96 | 72 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 10/30/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 10/30/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9